Tube-bending machine.



J. C. WILSON. TUBE BBNDING MACHINE.

APPLICATION FILED JAN. 29. 1909.

Patented Feb. 7, 1911.

'I SHEET S-SEEET 1.

| llll'llllllllllllllllllll ulllmlmll muuu' lll il z/f J C WILSON TUBE BBNDING MACHINE.

APPLICATION -IILED JAN. 29. 1909. 983,664. Patented 111610.11911.

7 SHEETS-SHEET 2.

Patented Febf'?, 1911.

om. 0 9 El N- .mm NGN OAA MMM G INM w11 MF C.EN .Bm JMA Um TL P P A J. C. WILSON.

TUBE BENDING MACHINE.

rPLIoATIoN FILED JAN. 29, 1909.

Patented Feb. '7, 1911.

'I SHEETS-SHEET 4.

Patented Feb. 7, 1911.

.uw 0 .9 El N. .mw NGN. UAA mm.. D G mmm m? N GB .Bm .JMA Um TL P P A I SHEETS-BHBET 5.

J. C. WILSON.

TUBE BENDING MACHINE.

APPLICATION FILED JAN. 29. 1909.

Patented Feb. '7, 1911.r

7 SHEETS-SHEET 6.

J. C. WILSON.

TUBE BENDING MACHINE.

APPLIGATION FILED 1,111.29. 1909.

983,664. Patented Feb.7, 1911.

I SHEETS-SHEET 7.

junrrnn smrals rnrnnr onirica.

JOHN' C. WILSON,"0F KENOSHA, WISCONSIN, ASSIGNOR TO THE SIMMONS MANUFAC- TUBING' COMPANY, 0F KENOSHA, WISCONSIN," A CORPORATION OF WISCONSIN.

TUBE-BENDING MACHINE.

Specication of Letters Patent1 Patented Feb. 7, 1911.

Application led January 29, 1909. Serial No. 475,016.

nosha, `in thecounty of Kenoshaand State of Wisconsin, have invented certain new and u sefulImprovements in Tube-Bending Machines, of which the following is a speci- .fication This invention .concerns machines for bending tubes or pipes such as are used in metallic furniture, for example, bedsteads.

At present it is fashionablegto provide they tubes forming the main parts of the head and foot of a bedsteadwith one or more humps or curves, and it is to meet the need for machines which will bend' tubes for such purposes that I have devised the bending machine described hereinafter which incorporatesl this invention. l

Succinctly stated, my improved device in its mst desirable embodiment has a plurality of rotary forms about which `different portions of the tube are successively bent to provide the camel-back features referred to above. y

In the accompanying drawings, which lillustrate such an embodiment of my invention, I h ave shown a machine with its parts in different positions clearly indicating the various4 steps in the bending operations. Throughout the various views of these, drawings like reference characters refer to the same part's In'the drawings-Figure 1 is a top plan viewv of the improved .mechanism showing alportion of the tube or pipe in the position which it occupies preliminary to the rst bending operation; Fig. 2 illustrates the positions of the parts after the first bend has been made in the pipe or tube, certain parts being broken away to more clearly show the internal construction; Fig. 3 indicates the arrangement of elements after the second or reverse bend hasbeen placed in the` tube; Fig. 1 illustrates the location of andthe manner of attaching the third form to the mechanism preparatory to givin the pipe its final bend of the first series ;F1g. `5 shows the location of the parts after the third or last bend has been made in the tube; Fig. 6 illustratesthe arrangement of parts and the position of the tube or pipe just before the first bend of the second series is made; Fig.

7 is a similar view after all the bends have on line 8-8 of Fig. 2; and Fig. 9 is a side elevation ofthe machine asviewed in the direction indicated by the arrow in Fig. f1.

lReferring to the various views, it will be noticed that the machine includes a suitably# supported horizontal plate' 10 which I will Y hereinafter refer to as a table to distinguish this plate from other parts of the mechanism. Pivoted on this table 10 on a hollow pin 11, and. adapted to rest on the top face of the table, I provide a flat frame support 12 having two substantially-parallel projections 13 and 14. Upstanding from the leg or extension 13 and secured in an aperture of the same by a set-screw 15, I provide a pivot-pin or post 16, clearly shown in Fig. 8, and on this pivot pin or stud I pivot or fulcrum a quadrantplate 17 having an extension 18 apertured at 19 to receive the pin 16. As is clearly shown, this quadrant plate rests upon they top face of the frame-support 12. .On one edge this quadrant plate 17 is equipped'wlth a pair of apertured ears 20 with which a detachable handle 21 is adapted to coperat'e,

this handle having a pair of studs 22 adapted to fit in the holes of the apertured ears -20 when it is desired to apply the handle to this plate. On another edge this quadrant is recessed at 23 "to partially recel ve and accommodate an upstanding .locking pin 24 passing through an aperture 12 in the sup port 12 into a recess or socket 10 of the table 10 (Fig. 9). Thisquadrant plate 1s also suppliedwith another apertured ear 25,

,the object of which will be indicated, hereinafter. The plate 17 has in addition an un-v dercut slot 2G intended to accommodate the head 27 ,of a bolt 28, the Shank of which is bolt may be adjustably secured in any def sired position in the elongated slot 2G. On this sleeve 29 I pivoter fulcrum a quadrant form or sector 32 grooved at 33 on its curved edge concentric to the axis of the sleeve to accommodate approximately onehalf of a `cylindrical tube or pipe, as 1s clearly shown in Fig..8. `This pivoted form or sector has a hole 34 extended .therethrough, and on the opposite portion 1s supplied with a pair of apertures 25 to which the handle 21 may be detachablv applied.

c The curvedhedge or face of this pivoted form y32 is supplied with av comparatively large notch or recess-36 adapted to receive a block 37 grooved on its outer edge at 38' to forma tangential extension or. prolongation of a portion of the groove 33, whereby, as will be apparent, it is capable of accommodatin a portion of the tube or pipe to be acte upon. This pivoted form has a central o ening 39, the outer curved' edge 40 of-whic is notched at 41 to receive a tongue 42 yon a clamp 43 equipped with a screw 44, the inner end of which is intended to bear against a pressure-block 45 grooved on its inner face to receive the outer portion of the tube or pipe. As will be apparent, the coperating recess and tongue41 and 42'prevent the .drical stud or clamp from slipping out of place'. lAbove the quadrant-plate 17 I pivot on the cylinost 16 a smaller substanf tially-senii-circu ar sector or segment form u 46 grooved on its curved face at 47 to receive a portion of the tube to be bent.

In addition to the parts mentioned, this 'bending machine is supplied with a detach- -able semi-cylindrical form 48 similar to the curved form 46, a pivot-pin'49 adapted to be temporarily placed in the hollow pivot pin,

11, and a link 50 apertured at its opposite endsto receive'portlons of the pins 16 andl 49, the location of these parts when in operative position being shown, for example, in

Fig. 4. 1

Upstanding from the table 10 is a bracket 51 having at its end a sleeve 52 intended to accommodate the tube or pipe 53 to be bent and an arbor 54 within the same mounted on the end of a rod 55 supported at its oppo' site end by any suitable standard or bracket 56, this` rod being desirably equipped with.

an adjustable stop 57 which is fastened to the rod in adjusted position in the usual manner by a ,set-screw 58.

The operation of this mechanism takes place in substantially the following manner:

The various parts ot the mechanism being in the positions indicated in Fig. 1, a length 4of pipe 53 to be bent is slid over the arbor 54,

.through the supporting sleeve 52, and over the rod 55 until its end strikes the stop 57.

. The blocks 37 and 45 are then applied to opposite portions -of the tube and clamped iixedly to the tube by applying the clamp 43 and turning its gripping screw 44, so that there is no possibillty of the tube sliding .relatively to the clamping blocks and the rotatating in a likedirection by also'strikin against the pin 24, as is clearly illustrate The handle 21, which may be of any suitable length to obtain the necessary leverage,

applied to the quadrant form 32 by peimitting its prongs or pins 22 to enter the correspondingly spaced apertures 35, whereupon this form 32 is swung around approxi-v mately 45o, or any other extent desirabletey the position indicated in Fig. 2, the rotary.

form 46 also ordinarily turning on its pivotpin 16, due to the friction between the tube and-this second form. It will be apparent that the combined actions of the arbor 54 androtary form 46 prevent the tube from becoming displaced or improperly bent, and that during the turning movement of\ the form 32 a part of the tube or pipe is compelled toassume the curvature of its convex face. At the completion of this partial rotation of the sector or form 32, its round hole v 34 is brought into register with aY hole 59 of the same size in the plate 17, whereupon a pin 60 is placed in the alined holes, thereby locking the form 32 to the plate. In order to obtain the next or reverse bend in the pipe, the handle 21 is detached or vremoved from the form 32 and is a plied to the ears `20 of the quadrant-plate 1 and after such attachment this quadrant-plate, the form 32 locked thereto, and the pipe clamped to the form are swung in a counter-clockwise direction about the pin 16, thetube during-this Y turning being bent around the smaller segmental orm 46 which is free to rotate during such bending operatiorr, the relation of the. parts after the completion of this sec- `ond bendin the pipe or tube being vclearly indicated in Fig. 3. A long pivot or fulcrum pin 49is used to pivot the third `form or sector 48 to the machine, this pin being placed in the hollow pin or sleeve 11. As isclearly indicated in Fig. 4, the link 50 receiving 1n the holes at its opposite ends the top portions of pins 16 and 49 acts to prevent them from being displaced. After' Jthe parts have assumed the relation indicated in Fig.` 3, that is, after the second bend has been made,

the quadrant-plate 17 is locked to the frame support 12 by passing aV locking-pin 61 through the hole of the apertured ear' 25 and -another hole 62 properly positioned the support 12. The pin 24 is then removed. The detachable'handle isallowed toremain attached to the plate 17 and this plate, together with the form 32, the pipe clamped thereto, the second form 46, and the link 50 are swung-around in a clockwise direction about the axle or pin 49, the form 48 turning at the same, time, and about which form the third bend in the pipe is made, until the parts assume the relation indicated in Fig. 5. This completes one-half of the bending of the pipe at the head-or foot ofa bedstead, the other seriesof bends being accomplished by applying such a partially-bent tube to the machine with its elements in their original position, as shown in Fig. 6,- but it is neccssaryvin order to accommodate suchv a bent tube that the clamp blocks 37 and 45 be replaced by other blocks 63 and 64 recessed lon their adjacent faces to accommodate the tube. It will be noted that the groove in the clamp-block 63 forms a curved extension of and'has the same curvature as the groove 33 of the quadrant form p32, the block 64 being correspondingly Shaped but applied to the bent part of the tube instead of to a straighty in Fig. l. The same clamp 43 `can Without difliculty be removed from the machine. It should' be noted furthermore that whereas I have herein described and set forth one preferred embodiment of the invention. the invention is susceptible of a variety oi embodiments and is not, theretore, limited to the precise structural details herein described.

I claim:

l. In a bending machine, the combination of a plurality of rotary forms, means to bend the piece to ybe operated upon succes.

sively about said forms, and means to maintain the same relation between each form` and the part of the piece bent about said .form during subsequent bendings as they had at the completion of the bending about said form.

2. In a bending machine, the combination of a pivoted plate,'means to lock said-plate against turning on its pivot, a form pivoted on said plate, a second form pivoted concentric-ally with said plate, means to fasten the piece to be bent to said first form, means to lock .said first form from turning on its pivot during the turning of said piece about said second form, whereby said piece may be first bent during the turning of said irst iorm with said plate locked against rotation and bent again about the second form dur-v ing the turning of the first form and plate -and 'means 4to turn said forms about the axis of said second form with said `first form locked against rotation on said plate.

3. In a bending machine, the combination of a plurality of rotary non-concentric sector forms against the curved faces of which the piece to be bent is adapted' to bear, means to secure said piece to. one of said forms, and means whereby said lsector forms may be-turned' about their individual axesto provide the piece with suitable curves.

sl. ln a bendingmachine, the combination of a pivoted support, a lock for said support, a plate fulcrumed on said support, a lock for said plate, a form pivoted 'on said plate', means to lock said form vto said plate, a second form' pivoted on said support concentrically with said plate, a third form detachably pivoted on Isaid support concentrioally with its pivot, means to secure the piece to be operated uponto said first form,

individual centers to provide said piece with suitable curves.

In a bending machine, the combination with a plurality of forms, of means to bend a piece successively about said forms, and means for locking two or more of said forms together during certain of said operations.

6. In a bending machine, the combination with a plurality of forms, of. means for bending the piece to be operated on succes sively about said forms, and means for moving av plurality of-said forms synchronously during certain of said operations.

7 ln a bending machine, vthe combination with a pivot support, a plate fulcrumcd-` thereon, a plurality of forms ivoted on said plate, means for causing said forms to maintain definite relations relative to each otherl during certain of the operations, and means for turning said forms.

8. In a bending machine, the combination With-a plurality of rotary .non-concentric forms, of means to secure a piece to one of said forms, means for moving said forms about their individual axes, and means to maintain a' definite relatior. between these :forms during certain of the forming operations. JOHN` C. l/VILSON.

Witnesses' J. H. CANTWELL, Jr., Gus JACOB.

about their y 

